Java public void onClick（视图v）导致应用程序崩溃

我想让用户点击两个按钮中的一个进行计算，但onClicklistiner

和public void

onClick`会导致应用程序崩溃。 然而同样的事情在一个新的空白java主工程。这两组代码都放在下面。按钮实现代码相同，唯一的区别是第一组代码设置了导航抽屉

    package com.androidbelieve.tradingtechnicals;

    import android.support.design.widget.Snackbar;
    import android.support.v7.app.ActionBarActivity;
    import android.os.Bundle;
    import android.support.design.widget.NavigationView;
    import android.support.v4.app.FragmentManager;
    import android.support.v4.app.FragmentTransaction;
    import android.support.v4.widget.DrawerLayout;
    import android.support.v7.app.ActionBarDrawerToggle;
    import android.support.v7.app.AppCompatActivity;
    import android.view.MenuItem;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.TextView;
    import android.widget.Toast;
    import android.view.Menu;

    import com.androidbelieve.drawerwithswipetabs.R;

    import com.google.android.gms.ads.AdRequest;
    import com.google.android.gms.ads.AdView;
    import com.google.android.gms.ads.AdSize;
    import com.google.android.gms.ads.AdListener;

    import java.text.NumberFormat;


    public abstract class MainActivity extends AppCompatActivity implements View.OnClickListener {


        DrawerLayout mDrawerLayout;
        NavigationView mNavigationView;
        FragmentManager mFragmentManager;
        FragmentTransaction mFragmentTransaction;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);


            mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
            mNavigationView = (NavigationView) findViewById(R.id.shitstuff);
            mNavigationView.setItemIconTintList(null);


            mFragmentManager = getSupportFragmentManager();
            mFragmentTransaction = mFragmentManager.beginTransaction();
            mFragmentTransaction.replace(R.id.containerView, new TabFragment()).commit();


            mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
                @Override
                public boolean onNavigationItemSelected(MenuItem menuItem) {
                    mDrawerLayout.closeDrawers();


                    if (menuItem.getItemId() == R.id.nav_formations) {
                        FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
                        fragmentTransaction.replace(R.id.containerView, new fomations()).commit();

                    }

                    if (menuItem.getItemId() == R.id.nav_main_menu) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new TabFragment()).commit();
                    }


                    if (menuItem.getItemId() == R.id.candle_sticks_drawer) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new candlesticks()).commit();
                    }


                    if (menuItem.getItemId() == R.id.candle_sticks_drawer) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new candlesticks()).commit();
                    }

                    if (menuItem.getItemId() == R.id.nav_Stochastic) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new stochastic()).commit();
                    }

                    if (menuItem.getItemId() == R.id.nav_Relative_strength) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new Relative_Strength()).commit();
                    }

                    if (menuItem.getItemId() == R.id.nav_MACD) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new MACD()).commit();
                    }


                    if (menuItem.getItemId() == R.id.nav_moving_averages) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new moving_averages()).commit();
                    }

                    if (menuItem.getItemId() == R.id.nav_help) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new help()).commit();
                    }


                    if (menuItem.getItemId() == R.id.nav_additional_content) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new additional_content_1()).commit();
                    }

                    if (menuItem.getItemId() == R.id.nav_p_e) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new Fundemental_metrics()).commit();
                    }

                    if (menuItem.getItemId() == R.id.nav_cdf) {
                        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                        xfragmentTransaction.replace(R.id.containerView, new eq_cfd()).commit();
                    }


                    return false;


                }

            });


            android.support.v7.widget.Toolbar toolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.toolbar);
            ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, toolbar, R.string.app_name,
                    R.string.app_name);

            mDrawerLayout.setDrawerListener(mDrawerToggle);

            mDrawerToggle.syncState();

            AdView mAdView = (AdView) findViewById(R.id.adView);
            AdRequest adRequest = new AdRequest.Builder().build();
            mAdView.loadAd(adRequest);


        }


        public void onClick(View v)


        {
            switch (v.getId()){

                case R.id.button1:




            EditText working_capital = (EditText) findViewById(R.id.working_capital);
            EditText total_assets = (EditText) findViewById(R.id.total_assets);
            EditText ebit = (EditText) findViewById(R.id.ebit);
            EditText market_val_eq = (EditText) findViewById(R.id.market_value_of_equity);
            EditText book_val_lib = (EditText) findViewById(R.id.book_lib);
            EditText retained_ern = (EditText) findViewById(R.id.retained_earnings);
            EditText sales = (EditText) findViewById(R.id.sales);

            TextView answer = (TextView) findViewById(R.id.result);
            TextView comment = (TextView) findViewById(R.id.comment);


            if (working_capital.getText().toString().trim().length() == 0 || total_assets.getText().toString().trim().length() == 0 || ebit.getText().toString().trim().length() == 0 || market_val_eq.getText().toString().trim().length() == 0 || book_val_lib.getText().toString().trim().length() == 0 || retained_ern.getText().toString().trim().length() == 0 || sales.getText().toString().trim().length() == 0) {

                answer.setText("Result");


            } else {

                double num1 = Double.parseDouble(working_capital.getText().toString());
                double num2 = Double.parseDouble(total_assets.getText().toString());
                double num3 = Double.parseDouble(ebit.getText().toString());
                double num4 = Double.parseDouble(market_val_eq.getText().toString());
                double num5 = Double.parseDouble(book_val_lib.getText().toString());
                double num6 = Double.parseDouble(retained_ern.getText().toString());
                double num7 = Double.parseDouble(sales.getText().toString());


                double sum = 1.2 * (num1 / num2) + 1.4 * (num6 / num2) + 3.3 * (num3 / num2) + 0.6 * (num4 / num5) + (num7 / num2);

                answer.setText(String.format("%.2f", sum));

                if (sum >= 2.99) {

                    comment.setText("Successful");

                } else if (sum <= 1.81) {

                    comment.setText("Unsuccessful");

                } else {
                    comment.setText("Grey zone");
                }


            }

                    break;

                case R.id.button2:

                    ebit = (EditText) findViewById(R.id.ebit);
                    EditText net_profit = (EditText) findViewById(R.id.net_profit);
                    EditText assets = (EditText) findViewById(R.id.assets);
                    EditText Sales = (EditText) findViewById(R.id.sales);

                    EditText Equity = (EditText) findViewById(R.id.equity);
                    TextView answer2 = (TextView) findViewById(R.id.result2);

            if (assets.getText().toString().trim().length() == 0 || net_profit.getText().toString().trim().length() == 0 || Sales.getText().toString().trim().length() == 0 || Equity.getText().toString().trim().length() == 0) {
                answer2.setText("Result");

            } else {

                double num8 = Double.parseDouble(net_profit.getText().toString());
                double num9 = Double.parseDouble(assets.getText().toString());
                double num10 = Double.parseDouble(ebit.getText().toString());
                double num11 = Double.parseDouble(Equity.getText().toString());

                double sum2 = (num8 / num10) * (num10 / num9) * (num9 / num11);

                answer2.setText(String.format("%.2f", sum2));
            }
            }
        }
    }



package engineeringtrader.myapplication;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Switch;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        Button button1 = (Button)findViewById(R.id.button1);
        Button button2 = (Button)findViewById(R.id.button2);

        button1.setOnClickListener(this);


        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onClick(View v) {

       switch (v.getId()){

            case R.id.button1:


                EditText working_capital = (EditText) findViewById(R.id.working_capital);
                EditText total_assets = (EditText) findViewById(R.id.total_assets);
                EditText ebit = (EditText) findViewById(R.id.ebit);
                EditText market_val_eq = (EditText) findViewById(R.id.market_value_of_equity);
                EditText book_val_lib = (EditText) findViewById(R.id.book_lib);
                EditText retained_ern = (EditText) findViewById(R.id.retained_earnings);
                EditText sales = (EditText) findViewById(R.id.sales);

                TextView answer = (TextView) findViewById(R.id.result);
                TextView comment = (TextView) findViewById(R.id.comment);

                if (working_capital.getText().toString().trim().length() == 0 || total_assets.getText().toString().trim().length() == 0 || ebit.getText().toString().trim().length() == 0 || market_val_eq.getText().toString().trim().length() == 0 || book_val_lib.getText().toString().trim().length() == 0 || retained_ern.getText().toString().trim().length() == 0 || sales.getText().toString().trim().length() == 0) {

                    answer.setText("Result");


                } else {

                    double num1 = Double.parseDouble(working_capital.getText().toString());
                    double num2 = Double.parseDouble(total_assets.getText().toString());
                    double num3 = Double.parseDouble(ebit.getText().toString());
                    double num4 = Double.parseDouble(market_val_eq.getText().toString());
                    double num5 = Double.parseDouble(book_val_lib.getText().toString());
                    double num6 = Double.parseDouble(retained_ern.getText().toString());
                    double num7 = Double.parseDouble(sales.getText().toString());


                    double sum = 1.2 * (num1 / num2) + 1.4 * (num6 / num2) + 3.3 * (num3 / num2) + 0.6 * (num4 / num5) + (num7 / num2);

                    answer.setText(String.format("%.2f", sum));

                    if (sum >= 2.99) {

                        comment.setText("Successful");

                    } else if (sum <= 1.81) {

                        comment.setText("Unsuccessful");

                    } else {
                        comment.setText("Grey zone");
                    }


                }


                break;
            case R.id.button2:
                break;

        }

    }
}

package com.androidbelieve.tradingtechnicals；
导入android.support.design.widget.Snackbar；
导入android.support.v7.app.ActionBarActivity；
导入android.os.Bundle；
导入android.support.design.widget.NavigationView；
导入android.support.v4.app.FragmentManager；
导入android.support.v4.app.FragmentTransaction；
导入android.support.v4.widget.DrawerLayout；
导入android.support.v7.app.ActionBarDrawerToggle；
导入android.support.v7.app.AppActivity；
导入android.view.MenuItem；
导入android.view.view；
导入android.widget.Button；
导入android.widget.EditText；
导入android.widget.TextView；
导入android.widget.Toast；
导入android.view.Menu；
导入com.androidbelieve.drawerwithswipatebs.R；
导入com.google.android.gms.ads.AdRequest；
导入com.google.android.gms.ads.AdView；
导入com.google.android.gms.ads.AdSize；
导入com.google.android.gms.ads.AdListener；
导入java.text.NumberFormat；
公共抽象类MainActivity扩展了AppCompatActivity实现了View.OnClickListener{
抽屉布局mDrawerLayout；
导航视图mNavigationView；
碎片管理器；
零碎交易；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
mDrawerLayout=（抽屉布局）findViewById（R.id.DroperLayout）；
mNavigationView=（导航视图）findViewById（R.id.shitstuff）；
mNavigationView.setItemIContentList（null）；
MFFragmentManager=getSupportFragmentManager（）；
MFFragmentTransaction=MFFragmentManager.beginTransaction（）；
替换（R.id.containerView，new TabFragment（））.commit（）；
mNavigationView.setNavigationItemSelectedListener（新的NavigationView.OnNavigationItemSelectedListener（）{
@凌驾
公共布尔值onNavigationItemSelected（MenuItem MenuItem）{
mDrawerLayout.closeDrawers（）；
if（menuItem.getItemId（）==R.id.nav_）{
FragmentTransaction FragmentTransaction=MFFragmentManager.beginTransaction（）；
fragmentTransaction.replace（R.id.containerView，new fomations（））.commit（）；
}
if（menuItem.getItemId（）==R.id.nav_主菜单）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
替换（R.id.containerView，new TabFragment（））.commit（）；
}
if（menuItem.getItemId（）==R.id.candle\u sticks\u drawer）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
替换（R.id.containerView，new candlesticks（））.commit（）；
}
if（menuItem.getItemId（）==R.id.candle\u sticks\u drawer）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
替换（R.id.containerView，new candlesticks（））.commit（）；
}
if（menuItem.getItemId（）==R.id.nav_）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
替换（R.id.containerView，new randomic（））.commit（）；
}
if（menuItem.getItemId（）==R.id.nav\u相对强度）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
替换（R.id.containerView，新的相对强度（））.commit（）；
}
if（menuItem.getItemId（）==R.id.nav_MACD）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
替换（R.id.containerView，new MACD（））.commit（）；
}
if（menuItem.getItemId（）==R.id.nav\u移动平均值）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
xfragmentTransaction.replace（R.id.containerView，new moving_averages（））.commit（）；
}
if（menuItem.getItemId（）==R.id.nav\u帮助）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
替换（R.id.containerView，new help（））.commit（）；
}
if（menuItem.getItemId（）==R.id.nav\u附加内容）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
xfragmentTransaction.replace（R.id.containerView，新的附加内容）commit（）；
}
if（menuItem.getItemId（）==R.id.nav\u p\e）{
FragmentTransaction xfragmentTransaction=MFFragmentManager.beginTransaction（）；
xfragmentTransaction.replace（R.id.containerView，new fundamental_metrics（））.commit（）；
}
if（menuItem.getItemId（）==R.id.nav_cdf）{